ARINC TO SYNCHRO UNIT (ATS) Back

In legacy aircraft, many display units are analog which can only receive synchro signals inputs 
whereas New generation systems provide the input to displays on ARINC 429 or MIL 1553B 
Bus. ATS unit is an interface between bus based new systems and legacy synchro based 
analog displays.
The ARINC to Synchro (ATS) Unit is a digital to synchro converter system that receives 
angular data (Heading and Bearing) on two ARINC-429 inputs and converts it into two 
independent ARINC-407 analog synchro output (3-wire) to interface with on the board Radio 
Magnetic Indicator (RMI) of helicopter.ATS unit has following main functions:
I) It converts the ARINC-429 data received from two ARINC sources into two independent 
Synchro outputs in channel-1 & in channel-2.
ii) Interfaces with the discrete switch to select the processing of ARINC Channel 1 or Channel 2 
inputs or both.
iii) Indicates the health status of ARINC 429 input source.